Edge trimming machine



A. R. MORRILL EDGE TRIMMING MACHINE Aug. 8, 1933.

Filed Jan. 26, 1931 2 Sheets-Sheet l 8, 1 A. R. MORRILL EDGE TRIMMING MACHINE Filed Jan. 2, 1931 2 Sheets-Sheet 2 [Eg /212W ranawwywi Patented Aug. 8, 1933 UNITED STATES EDGE TRIMMING MACHINE Alfred E. Morrill, Beverly, Mass, assignor to United Shoe Machinery Corporation, Paterson, N. J., a Corporation of New Jersey Application January 26, 1931. Serial No. 511,179

Claims.

The present invention has relation in general to edge trimming machines of the typein which the shoe and the edge trimming devices are moved relatively to transfer the point of operation about the shoe and in which mechanism is provided for relatively moving the edge trimming devices and the shoe to maintain the edge trimming devices and the shoe in proper relative positions at the point of operation as such point is transferred about the shoe. The invention has relation in particular to machines having an adjustable guide adapted to cooperate with a templet, mounted upon the sole of a lasted shoe in controlling the position of the shoe with relation to the edge trimming devices as the point of operation is transferred about the shoe.

The principal object of the invention is to pro vide a means whereby the templet guide may be readily located with relation to the edge trimming cutter so as to cooperate with the templet in producing a margin on the shoe sole of a predetermined width.

Another object of the invention is to provide an improved work support and guard for holding the upper of the shoe out of contact with the cutter and for positioning the shoe in the desired vertical relation to the cutter.

With the above and other objects in view as will hereinafter appear, the invention consists in the construction, combinations, and arrangements of parts hereinafter described and claimed, the advantages of which will be readily understood by those skilled in the art from the following description.

Referring to the accompanying drawings, illustrating the invention in its preferred form, Fig. 1 is a front elevation of an edge trimming machine having the devices of the present invention embodied therein; Fig. 2 is a side elevation of the head of the machine illustrating the devices of the present invention; and Figs. 3 and 4 are detail side and end views of a graduated disk or dial forming an element of the device for gauging the templet guide.

The machine illustrated in the drawings as embodying the several features of the present invention is an automatic machine of the type illustrated and described in the applicants prior application Serial No. 412,239 filed December 6, 1929 for Automatic edge trimmer, which type of machine comprises suitable tools for performing an edge trimming operation progressively along the bottom margin of a lasted shoe, a jack upon which the shoe is supported, and means for automatically controlling the movements of the jack so that no manual manipulation of the shoe by the operator is required during the operation.

The jack of the machine illustrated in the drawings comprises heel and toe supports 6 and 8 which are supported upon a vertical spindle 10 and which are actuated to clamp a lasted shoe automatically in proper position on the jack when the shoe is placed upon the jack by the operator and which are automatically actuated at the conclusion of the edge trimming operation to unclamp the shoe. This jack is the same in construction and mode of operation as the jack disclosed in applicants prior patent No. 1,689,594 dated October 30, 1928. During the edge trimming operation, the jack is moved in the direction of feed and'is rotated to-transfer the point of operation about theshoe from the heel breast of the shoe at one side to the heel breast at the other side,-and simultaneously tipping movements are imparted to the jack to com- H pensate for the transverse and longitudinal curvatures of the shoe sole. To enable the jack to be so actuated, it is mounted inthe machine in the same manner as the jack of applicants prior patent above referred to, and is acted upon by mechanism constructed, arranged and operated as the corresponding mechanism of the ma chine of said patent.

Briefly stated, the jack supporting structure comprises an arm 12in theforward end of which a the lower end of the jack spindle 10 is rotatably mounted by means of a gimbal joint, a support 14 upon which the arm 12 ismounted to swing vertically, and a frame 16 pivotally mounted at its lower end in the machine base so as to be capable of swinging about a horizontal axis and upon which the support 14 is mounted to swing about a substantially vertical axis. The mechanism for moving the jack inthe direction of feed, for rotating the jack and for imparting tipping movements to the jack, comprises a vertical pattern cam shaft 18 upon which a series of pattern cams 20 are mounted, and connections from the cam shaft to the jack and jack supporting structure comprisingthe feed lever-22 connected by the link 2 1 to the toe portion 8 of; thejack, the cord 26 passing around a wheel mounted in the forward end of the arm 12 and connected through the gimbal joint to the jack spindle 10, and cam levers 30 and 32 connected respectively to the frame 16 and support 14.

A templet under the guidance of which the edge trimming operation is performed upon a shoe. sole is indicated at 34. This templet consists of a rigid block of wood the undersurface of which fits closely against the sole surface. The templet is shaped to extend over the forepart and shank only and is formed with a peripheral contour corresponding to the outline which the edge of the outsole is to have in these parts of a finished shoe. The templet is located on the shoe by means of a pin 38 projecting from the last through a perforation in the sole of the shoe into a slot 36 formed in the heel end of the templet and by means of a pin 42 projecting from the sole engaging surface of the templet at its toe portion and engaging an indentation 44 formed in the surface of the sole. The templet is firmly clamped in position by means of a clamping plate 46 at the lower end of a plunger 48 mounted in a vertical guideway in the outer end of a supporting arm 50 and arranged to be actuated by a manually operable cam lever 52 pivotally mounted on the arm. The arm 50 is pivotally supported at its lower end on the lower portion of the heel portion 6 of the jackto permit a swinging movement of the arm from the position indicated in full lines in Fig. 1 to and from the position indicated in dotted lines in the figure. When mounted in position on the shoe sole, the edge of the templet is at some distance inside of the sole edge in position to cooperate with an edge guide during the edge trimming operation.

As thus far described, the illustrated machine is identical with the machine of the applicants prior application hereinbefore referred to. In

embodying the several features of the present invention in the machine an adjustable templet guide to cooperate with the templet during the trimming operation has been provided consisting of a horizontal plate or arm 62 slidably mounted on the upper surface of the forward extension 64 of the machine frame, said arm having an opening through which the trimming cutter 65 with its supporting shaft passes and being bent downwardly and forwardly to bring its forward end 66 into a position to engage the edge of the templet 34 in line with the axis of the cutter transversely of the direction of feed. The arm 62 is adapted to be secured to the extension 64 by means of the clamping screw 68 which passes freely through the slot '70 in the arm 62, and is threaded to a tapped hole in the extension 64. Means for effecting a longitudinal adjustment of the arm 62 consists of a thumb screw '72 threaded to a tapped hole in the rear end of the arm 62. The head of the thumb screw 72 is positioned to pass through an arcuate groove 74 in the extension of the machine frame and is held by said groove against longitudinal movement, the width of said groove being substantially the same as the thickness of the head of the thumb screw. 1

The principal feature of the invention consists' of a gauge for use in positioning the templet guide 62 whereby the guide may be readily located with relation to the trimming cutter 65 so as to cooperate with the templet in producing a margin on the shoe sole of a predetermined width. In the present embodiment of the invention the gauge consists of an arm in the form of a yoke 92 pivotally mounted at 104 upon the motor casing and arranged to be swung manually into a position to indicate the correct position for the guide 62. The yoke 92 is held alternatively in and out of gauging position by means of the spring 98, one end of which is mounted upon the pin 100 secured to the yoke, and the other end of which is mounted upon the pin 102 secured to the machine frame. The spring 98 is so positioned relatively to the yoke 92 that rotation of the yoke is located a predetermined distance from the cutter engaging surface. As illustrated, the surface which engages the cutter comprises the end of a screw 94 adjustably threaded in the yoke 92 and secured in adjusted position by means of the locknut 96. This screw 94 is located in the yoke 92 in such a position that when the yoke is swungdown into operative position, as illustrated in Figure 2, it can engage the periphery of the cutter 65 so that the position of the gage is determined by the peripheral cutting edges of the cutter. The surface which is engaged by the adjustable guide 62 is thus located always at a predetermined distance from the cutting edge regardless of the size of the cutter, and consequently the guide can be set easily and quickly to produce a sole margin of a predetermined width, regardless of any variation in the size of the cutter, due to grinding or other cause.

Different sizes and styles of shoes are provided with sole margins of different widths and in order to enable the edge gage 62 to be easily and quickly located so as to produce sole margins of any one of a number of predetermined widths, the gage of the illustrated machine is provided with a p1u- 'rality of surfaces to cooperate with the guide 62.

As illustrated, three of these surfacesare pro vided as indicated at 78, and 82. These sur faces are formed upon a disc 76 which is provided rought to a position to be engaged by the guide.

As a convenient means for rotating the disc, the outer end of the stud 86 is provided with a knurled head 84. The disc '76 is held in adjusted position by means of a spring plunger 90 mounted in the yoke 92 and arranged to engage any one of a series of cup-shapedrecesses 88 formed in the back of the disc. For the convenience ofthe operator, the surfaces '78, 80 and 82 may be marked, as illustrated in Figure 4, to indicate the width of sole margin which will be produced when any one of these surfaces are used in determining the location of the edge guide with relation to the cutter.

A work support is provided in the form of the arm 108 which also acts as a guard for holding the upper of the shoe out of contact with the trimming cutter. The arm is adapted to be secured within a split clamp composed of the de pending lugs 12c and the clamping bolt 110 upon which the arm is rotatably mounted. The forward end of the arm 108 is positioned vertically by the horizontal studs 112 projecting from opposite sides thereof and adapted to be positioned within the notches 114 in the parallel lugs 116 depending from the forward extension 64 of the machine frame. In order to permit longitudinal adjustment of the arm 108 to accommodate it to varying sizes of cutters, a horizontal slot 118 is formed therein for the reception of the clamping bolt 110. The slot 118 also permits disengagement of the studs 112 from the notches 114 to allow the arm 108 to be rotated out of operative position when it is desired to remove or replace the cutter. At its forward end, the arm 108 is bent upwardly and forwardly to bring it up to the level of the base of the trimming cutter 65 and is ex tended laterally and recesses at its upper surface to provide clearance 109 for the cutter. The arm 108 is beveled vertically and rounded horizontally at its for lard end to permit it to extend into the space between the upper and sole of the shoe, and is slightly rounded at its edge to prevent it from scratching the upper.

The nature and scope of the invention having been indicated, and an embodiment of its several features having been specifically described, What is claimed as the invention is:

1. An edge trimming machine having, in combination, an edge cutter and a shoe supporting jack relatively movable to transfer the point of operation of the cutter around the sole of a lasted shoe supported on the jack, a templet mounted on the sole of the shoe, an adjustable guide to bear against the templet during the trimming operation, and a gauge for positioning said guide relatively to the cutter.

2. An edge trimming machine having, in combination, an edge cutter and a shoe supporting jack relatively movable to transfer the point of operation of the cutter around the sole of a lasted shoe supported on the jack, a templet mounted on the sole of the shoe, an adjustable guide to bear against the templet during the trimming operation, a gauge for positioning said guide relatively to the cutter, and means for holding said gauge out of gauging position.

3. An edge trimming machine having, in combination, an edge cutter and a shoe supporting jack relatively movable to transfer the point of operation of the cutter around the sole of a lasted shoe supported on the jack, a templet mounted on the sole of the shoe, an adjustable guide to bear against the templet during the trimming operation, a guage for positioning said guide relatively to the cutter, and means for yieldingly holding said gauge alternatively in and out of gauging position.

4. An edge trimming machine having, in combination, an edge cutter and a shoe supporting jack relatively movable to transfer the point of operation of the cutter around the sole of a lasted shoe supported on the jack, a templet mounted on the sole of the shoe, an adjustable guide to bear against the templet during the trimming operation, and a movable gauge for positioning the guide relatively to the cutter provided With a surface to engage the cutter and with a surface to be engaged by the guide.

5. An edge trimming machine having, in combination, an edge cutter and a shoe supporting jack relatively movable to transfer the point of operation of the cutter around the sole of a lasted shoe supported on the jack, a templet mounted on the sole of the shoe, an adjustable guide to bear against the templet during the trimming operation, and a movable gauge for positioning said guide relatively to the cutter provided with an ad justable cutter engaging member and with a surface to be engaged by the guide.

6. An edge trimming machine having, in combination, an edge cutter and a shoe supporting jack relatively movable to transfer the point of operation of the cutter around the sole of a lasted shoe supported on the jack, a templet mounted on the sole of the shoe, an. adjustable guide to bear against the templet during the trimming operation, a pivotally mounted gauge arm arranged to be swung manually into a position to indicate the correct position for said guide.

7. An edge trimming machine having, in combination, an edge cutter and a shoe supporting jack relatively movable to transfer the point of operation of the cutter around the sole of a lasted shoe, an adjustable guide to bear against the templet during the trimming operation, means for positioning said guide alternatively in a plurality of predetermined positions relatively to the cutter comprising a gauge having a plurality of positioning surfaces to be engaged alternatively by said guide.

8. An edge trimming machine having, in combination an edge cutter and a shoe supporting jack relativelymovable to transfer the point of operation of the cutter around the sole of a lasted shoe supported on the jack, a templet mounted 3 rality of positioning surfaces adapted to be presented alternatively to said guide by rotation of said member.

9. An edge trimming machinehaving, in combination an edge cutter and a shoe supporting jack relatively movable to transfer the point of operation of the cutter around the sole of a lasted shoe supported on the jack, a templet mounted on the sole of the shoe, an adjustableguide to bear against the templet during the trimming operation, means for positioning said guide alter-v natively in a plurality of predetermined positions relatively to the cutter comprising a movable gauge having a cutter engaging surface and a plurality of surfaces to be engaged by the guide,

10. An edge trimming machine having, in combination, an edge cutter and a shoe supporting jack relatively movable to transfer the point of operation of the cutter around the sole of a lasted shoe supported on the jack, a combined Work support and guard comprising a bar arranged to extend at one end into the space between the upper and the sole of a shoe on the jack to position the shoe in vertical relation to 7 ALFRED a. MORRILL. 

